中国石油网消息：9月2日，从长城钻探钻井三公司了解到，由这个公司自主设计的首套电动大钳已完成全部试验科目。设备运行稳定，上卸扣扭矩控制精度达到预期目标。

China Oil News: On September 2nd, it was learned from the Third Drilling Company of Great Wall Drilling that the first set of electric large wrenches independently designed by this company has completed all the test items. The equipment operates stably and the torque control accuracy for loading and unloading is within the expected range.

长期以来，传统液压动力钳在井口上卸扣作业中依赖液压系统传动，管线与密封件长期承受井口震动和泥浆侵蚀，渗漏油问题几乎成为每口井的“标配烦恼”。更棘手的是，液压系统依靠油压间接换算扭矩，精度偏差较大，上扣欠扭或过扭的情况时有发生，难以满足智能钻井对数据采集和精准管控的需求。

For a long time, traditional hydraulic power clamps have relied on hydraulic systems for transmission during the disengagement operation at the wellhead. The pipelines and seals have been subjected to wellhead vibrations and mud erosion for a long time, and the problem of oil leakage has almost become a "standard annoyance" for every well. What's more challenging is that the hydraulic system indirectly converts torque based on oil pressure, resulting in significant accuracy deviations. There are often situations where the clamping torque is insufficient or excessive, making it difficult to meet the requirements of intelligent drilling for data collection and precise control.

为此，这个公司组建装备研发团队，联合动力钳制造厂家开展专项攻关，将突破口锁定在电动伺服技术上，彻底摒弃传统液压传动结构，用电机直驱替代液压站和管路系统。

To achieve this, the company established an equipment research and development team and collaborated with power clamp manufacturers to conduct a special research project. They focused on the breakthrough in electric servo technology, completely abandoning the traditional hydraulic transmission structure and replacing the hydraulic station and pipeline system with direct motor drive.

试验当天，这套电动大钳的表现让大家眼前一亮：钻台面干净利落；高精度扭矩闭环控制系统实时采集作业数据，上扣曲线在显示屏上一目了然，扭矩数值精准可控；机械结构大幅精简，日常维护项目明显减少。更关键的是，整套设备全程无液压油品参与，从源头上消除了漏油污染和火灾隐患。

On the day of the test, the performance of this electric large wrench impressed everyone: the drilling platform surface was clean and tidy; the high-precision torque closed-loop control system continuously collected operation data, the engagement curve was clearly visible on the display screen, and the torque value was precisely controllable; the mechanical structure was significantly simplified, and the daily maintenance items were noticeably reduced. More importantly, the entire set of equipment did not involve hydraulic oil throughout the process, eliminating the risks of oil leakage pollution and fire hazards from the very beginning.

电动大钳的数据可追溯性让每一根钻杆的上卸扣质量都有了“电子档案”，对提升钻井施工标准化水平意义重大。

The data traceability of the electric tong ensures that the disassembly and assembly quality of each drill pipe has an "electronic record", which is of great significance for improving the standardization level of drilling operations.